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US Patent: 529,401
Spiral screw driver and drill
Patentees:
William H. McCoy - Millers Falls, MA
Henry Pratt - Brooklyn, NY

USPTO Classifications:
279/143, 279/49, 7/165

Tool Categories:
screwdrivers : screwdriver mechanisms : spiral screwdrivers
woodworking tools : hand drills : spiral drills

Assignees:
Millers Falls Co. - Millers Falls, MA

Manufacturer:
Millers Falls Co - Millers Falls, MA

Witnesses:
Geo. W. Nims
E. S. Elliot
Fredk. S. Robley
Howard E. Stoughton

Patent Dates:
Applied: Feb. 21, 1894
Granted: Nov. 20, 1894

Patent Pictures: [ 1 | 2 | 3 ]
USPTO pdf tiff
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"Vintage Machinery" entry for Millers Falls Co.
Description:

Per an 1894 Millers Falls catalog(reprint) it was sold as either a No. 11 which included 3 screwdriver bits, or a No. 12 which had the 3 screwdriver bits and 8 drill points along with an adapter to allow the drill points to fit the larger screwdriver slot.

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